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hks wrote

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we are not providing a service to identify the product based on photos.

 

my friend also has an hks crankshaft, he did not do any machining of the crankshaft and I saw the same photos on the Internet. he has a box with the date 04/05. step2 is written on it
it weighs 22kg and looks like this

z3_nFbbAMl4.jpg.78d8cb628a86ed9992dedc17116ae932.jpg

qxFdJ-A-RCI.jpg.0850b6e9d8bb3218908360f09fe928bc.jpg

I also found this message

1dLXtVP__8g.jpg.2d6698fff86df7da35579e2ca689b6f6.jpg

 

also on yahoo japan other crankshafts, more machining, think weight 20kg

Screenshot_2.jpg.00204785197c5a153852e35b61df25bc.jpgScreenshot_3.jpg.9b39b024ceb6708200664b8add15f9c3.jpg

 

can't define, it's all confusing

I think to lighten the crankshaft by 2-3 kg, but I don't know if it's worth it.

Edited by frakzz

I want to understand the HKS recommendations for power and rpm.
in addition, the crankshafts have different hardening layer thicknesses (different technology). for step1 layer 0.2-0.3mm and for step2 1mm

My understanding is (I’m sure I’ve read it online somewhere aswell maybe rhdjapan)

step 2 is a lighter crank

so if yours weighs around 24kg and the step 2 you found online is around the 20-22kg mark then I would assume urs is a step 1

 

Correct step 2 is lighter than the step 0 / 1 (same) crankshaft.

11 hours ago, frakzz said:

I want to understand the HKS recommendations for power and rpm.
in addition, the crankshafts have different hardening layer thicknesses (different technology). for step1 layer 0.2-0.3mm and for step2 1mm

Who cares really, as the HKS step 0, 1 and 2 are all forged cranks, step 3 the overpriced but best billet one is now discontinued and a Spool billet 77.7mm stroker crank is cheaper (and better) than all of them.

 

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